PR c/24581

[pf3gnuchains/gcc-fork.git] / gcc / tree-complex.c

diff --git a/gcc/tree-complex.c b/gcc/tree-complex.c
index c7a7ad4..2835220 100644 (file)
--- a/gcc/tree-complex.c
+++ b/gcc/tree-complex.c
@@ -1,5 +1,6 @@
 /* Lower complex number operations to scalar operations.
-   Copyright (C) 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
+   Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009
+   Free Software Foundation, Inc.
 
 This file is part of GCC.
    
@@ -37,13 +38,17 @@ along with GCC; see the file COPYING3.  If not see
    out whether a complex number is degenerate in some way, having only real
    or only complex parts.  */
 
-typedef enum
+enum
 {
   UNINITIALIZED = 0,
   ONLY_REAL = 1,
   ONLY_IMAG = 2,
   VARYING = 3
-} complex_lattice_t;
+};
+
+/* The type complex_lattice_t holds combinations of the above
+   constants.  */
+typedef int complex_lattice_t;
 
 #define PAIR(a, b)  ((a) << 2 | (b))
 
@@ -94,7 +99,10 @@ some_nonzerop (tree t)
 {
   int zerop = false;
 
-  if (TREE_CODE (t) == REAL_CST)
+  /* Operations with real or imaginary part of a complex number zero
+     cannot be treated the same as operations with a real or imaginary
+     operand if we care about the signs of zeros in the result.  */
+  if (TREE_CODE (t) == REAL_CST && !flag_signed_zeros)
     zerop = REAL_VALUES_IDENTICAL (TREE_REAL_CST (t), dconst0);
   else if (TREE_CODE (t) == FIXED_CST)
     zerop = fixed_zerop (t);
@@ -745,23 +753,6 @@ update_phi_components (basic_block bb)
     }
 }
 
-/* Mark each virtual op in STMT for ssa update.  */
-
-static void
-update_all_vops (gimple stmt)
-{
-  ssa_op_iter iter;
-  tree sym;
-
-  FOR_EACH_SSA_TREE_OPERAND (sym, stmt, iter, SSA_OP_ALL_VIRTUALS)
-    {
-      if (TREE_CODE (sym) == SSA_NAME)
-       sym = SSA_NAME_VAR (sym);
-      mark_sym_for_renaming (sym);
-    }
-}
-
-
 /* Expand a complex move to scalars.  */
 
 static void
@@ -817,7 +808,6 @@ expand_complex_move (gimple_stmt_iterator *gsi, tree type)
        }
       else
        {
-         update_all_vops (stmt);
          if (gimple_assign_rhs_code (stmt) != COMPLEX_EXPR)
            {
              r = extract_component (gsi, rhs, 0, true);
@@ -860,7 +850,6 @@ expand_complex_move (gimple_stmt_iterator *gsi, tree type)
          gimple_return_set_retval (stmt, lhs);
        }
 
-      update_all_vops (stmt);
       update_stmt (stmt);
     }
 }
@@ -963,9 +952,11 @@ expand_complex_libcall (gimple_stmt_iterator *gsi, tree ar, tree ai,
   gcc_assert (GET_MODE_CLASS (mode) == MODE_COMPLEX_FLOAT);
 
   if (code == MULT_EXPR)
-    bcode = BUILT_IN_COMPLEX_MUL_MIN + mode - MIN_MODE_COMPLEX_FLOAT;
+    bcode = ((enum built_in_function)
+            (BUILT_IN_COMPLEX_MUL_MIN + mode - MIN_MODE_COMPLEX_FLOAT));
   else if (code == RDIV_EXPR)
-    bcode = BUILT_IN_COMPLEX_DIV_MIN + mode - MIN_MODE_COMPLEX_FLOAT;
+    bcode = ((enum built_in_function)
+            (BUILT_IN_COMPLEX_DIV_MIN + mode - MIN_MODE_COMPLEX_FLOAT));
   else
     gcc_unreachable ();
   fn = built_in_decls[bcode];
@@ -1624,7 +1615,7 @@ struct gimple_opt_pass pass_lower_complex =
   NULL,                                        /* sub */
   NULL,                                        /* next */
   0,                                   /* static_pass_number */
-  0,                                   /* tv_id */
+  TV_NONE,                             /* tv_id */
   PROP_ssa,                            /* properties_required */
   0,                                   /* properties_provided */
   0,                                   /* properties_destroyed */
@@ -1675,7 +1666,7 @@ struct gimple_opt_pass pass_lower_complex_O0 =
   NULL,                                        /* sub */
   NULL,                                        /* next */
   0,                                   /* static_pass_number */
-  0,                                   /* tv_id */
+  TV_NONE,                             /* tv_id */
   PROP_cfg,                            /* properties_required */
   0,                                   /* properties_provided */
   0,                                   /* properties_destroyed */